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问题 选择题

1 mol过氧化钠与2 mol碳酸氢钠固体混合物，在密闭容器中加热充分反应，排出气体物质后冷却，残留的固体物质是 [ ]

A．Na2CO3  

B．Na2O2 Na2CO3

C．NaOH Na2CO3  

D．Na2O2 NaOH Na2CO3

答案

答案：A

单项选择题

Routing protocols use different techniques for assigning (71) to individual networks. Further, each routing protocol forms a metric aggregation in a different way. Most routing protocols can use multiple paths if the paths have an equal (72) Some routing protocols can even use multiple paths when paths have an unequal cost. In either case, load (73) can improve overall allocation of network bandwidth. When multiple paths are used, there are several ways to distribute the packets. The two most common mechanisms are per-packet load balancing and per-destination load balancing. Per-packet load balancing distributes the (74) across the possible routes in a manner proportional to the route metrics. Per-destination load balancing distributes packets across the possible routes based on (75)

A．bracketing

B．balancing

C．downloading

D．transmitting
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单项选择题

已选定为长期不动户的存款帐户再次办理交易时，需经（）授权解除不动户标志后办理。

A.支局长

B.综柜

C.普柜

D.业务主管
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